| Extension | File Description |
| .SCR2 | Uncommon Files |
| .SCRAP | Uncommon Files |
| .SCREEM | Uncommon Files |
| .SCREEN | Uncommon Files |
| .SCRIPTLAS | Uncommon Files |
| .SCRN | Uncommon Files |
| .SCROLL | Uncommon Files |
| .SCROLL2 | Uncommon Files |
| .SCROLL7 | Uncommon Files |
| .SCSF | Uncommon Files |
| .SCSI | Uncommon Files |
| .SCSPACK | Uncommon Files |
| .SCSV | Uncommon Files |
| .SCS_TOR | Uncommon Files |
| .SCT?? | Uncommon Files |
| .SCY | Uncommon Files |
| .SD! | Uncommon Files |
| .SD0 | Uncommon Files |
| .SD1 | Uncommon Files |
| .SD3 | Uncommon Files |
| .SD4 | Uncommon Files |
| .SD4LF | Uncommon Files |
| .SD4PP | Uncommon Files |
| .SD5 | Uncommon Files |
| .SD6 | Uncommon Files |
| .SD7 | Uncommon Files |
| .SD8 | Uncommon Files |
| .SD9 | Uncommon Files |
| .SDAC | Uncommon Files |
| .SDE | Uncommon Files |
| .SDH | Uncommon Files |
| .SDJ | Uncommon Files |
| .SDK | Uncommon Files |
| .SDL | Uncommon Files |
| .SDML | Uncommon Files |
| .SDO | Uncommon Files |
| .SDOT | Uncommon Files |
| .SDPX | Uncommon Files |
| .SDQ | Uncommon Files |
| .SDQ?? | Uncommon Files |
| .SDS?? | Uncommon Files |
| .SDTHEME | Uncommon Files |
| .SDTS | Uncommon Files |
| .SDU | Uncommon Files |
| .SDV | Uncommon Files |
| .SDY | Uncommon Files |
| .SDZ | Uncommon Files |
| .SD_ | Uncommon Files |
| .SE | Uncommon Files |
| .SE0 | Uncommon Files |
| .SE1 | Uncommon Files |
| .SE2 | Uncommon Files |
| .SE3 | Uncommon Files |
| .SE4 | Uncommon Files |
| .SE5 | Uncommon Files |
| .SE6 | Uncommon Files |
| .SE7 | Uncommon Files |
| .SE8 | Uncommon Files |
| .SE9 | Uncommon Files |
| .SEARCHL | Uncommon Files |
| .SEB | Uncommon Files |
| .SECSTORE | Uncommon Files |
| .SECURITY | Uncommon Files |
| .sed | Uncommon Files |
| .SEE | Uncommon Files |
| .SEEK | Uncommon Files |
| .SEEM | Uncommon Files |
| .SEGER | Uncommon Files |
| .SEGMENT0 | Uncommon Files |
| .SEGMENT1 | Uncommon Files |
| .SEGMENT2 | Uncommon Files |
| .SEGMENT3 | Uncommon Files |
| .SEGMENT4 | Uncommon Files |
| .SEGMENT5 | Uncommon Files |
| .SEH | Uncommon Files |
| Extension | File Description |
| .SEI | Uncommon Files |
| .SEJ | Uncommon Files |
| .SEK | Uncommon Files |
| .SELECT | Uncommon Files |
| .SEM | Uncommon Files |
| .SEMA | Uncommon Files |
| .SEML | Uncommon Files |
| .SENSU | Uncommon Files |
| .SENSUX | Uncommon Files |
| .SENT | Uncommon Files |
| .SEPROJECT | Uncommon Files |
| .SEQUENCE | Uncommon Files |
| .SERIAL | Uncommon Files |
| .SERVER | Uncommon Files |
| .SERVICE | Uncommon Files |
| .SERVICES | Uncommon Files |
| .SESTYLES | Uncommon Files |
| .SET1 | Uncommon Files |
| .SET2 | Uncommon Files |
| .SET3 | Uncommon Files |
| .SETCLOCK | Uncommon Files |
| .SETUP | Uncommon Files |
| .SETVERS | Uncommon Files |
| .SEU | Uncommon Files |
| .SEV | Uncommon Files |
| .SEX | Uncommon Files |
| .SEY | Uncommon Files |
| .SEZ | Uncommon Files |
| .SE_ | Uncommon Files |
| .SF0 | Uncommon Files |
| .SF1 | Uncommon Files |
| .SF3 | Uncommon Files |
| .SF4 | Uncommon Files |
| .SF5 | Uncommon Files |
| .SF6 | Uncommon Files |
| .SF7 | Uncommon Files |
| .SF8 | Uncommon Files |
| .SF9 | Uncommon Files |
| .SFA | Uncommon Files |
| .SFARK | Uncommon Files |
| .SFD?? | Uncommon Files |
| .SFE | Uncommon Files |
| .SFG | Uncommon Files |
| .SFH | Uncommon Files |
| .SFI | Uncommon Files |
| .SFJ | Uncommon Files |
| .SFM | Uncommon Files |
| .SFN | Uncommon Files |
| .SFP | Uncommon Files |
| .SFPACK | Uncommon Files |
| .SFQ | Uncommon Files |
| .SFQ?? | Uncommon Files |
| .SFR | Uncommon Files |
| .SFT | Uncommon Files |
| .SFU | Uncommon Files |
| .SFY | Uncommon Files |
| .SFZ | Uncommon Files |
| .SG | Uncommon Files |
| .SG0 | Uncommon Files |
| .SG1 | Uncommon Files |
| .SG2 | Uncommon Files |
| .SG3 | Uncommon Files |
| .SG4 | Uncommon Files |
| .SG5 | Uncommon Files |
| .SG6 | Uncommon Files |
| .SG7 | Uncommon Files |
| .SG8 | Uncommon Files |
| .SG9 | Uncommon Files |
| .SGC | Uncommon Files |
| .SGCAP | Uncommon Files |
| .SGCDB | Uncommon Files |
| .SGCPO | Uncommon Files |
| .SGD | Uncommon Files |
| .SGDCT | Uncommon Files |
| .SGDK2 | Uncommon Files |
